YOU SAID:
a potato flew around my room before you came last night
INTO JAPANESE
あなたが昨晩来る前にジャガイモが私の部屋を飛び回った
BACK INTO ENGLISH
Potato flew around my room before you came last night
INTO JAPANESE
ポテトは昨晩あなたが来る前に私の部屋を飛び回った
BACK INTO ENGLISH
Potatoes flew around my room last night before you came
INTO JAPANESE
ジャガイモはあなたが来る前に昨晩私の部屋を飛び回った
BACK INTO ENGLISH
Potato flew around my room last night before you came
INTO JAPANESE
ジャガイモはあなたが来る前に昨晩私の部屋を飛び回った
BACK INTO ENGLISH
Potato flew around my room last night before you came
That didn't even make that much sense in English.